Tubular lantern.



G. L. BETTS.

TUBULAR LANTERN. APPLIOATION FILED AUG.13, 1912.

1,067,968, Patented July 22, 1913.

waaMmz 5 jazz/ k I %E FAEN CHARLES L. BETTS, OF NEW YORK, N. Y., ASSIGNOE TO B. E. DIETZ COMPANY, OF NEW YORK, N. Y.

TUBULAR LANTERN.

To all whom it may concern:

Be it known that I, CHARLES L. Burrs, a citizen of the United States, residing at New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Tubular Lanterns, of which the following is a specification.

This invention relates to that class of tubular lanterns which are provided with a chimney which extends upwardly from the globe and with an air-inlet chamber in which this chimney is arranged. Usually this chimney extends upwardly through the lantern top, but in an application filed by me March 23, 1911, Serial No. 616,543, a lantern is disclosed in which the chimney does not extend upwardly through the top but has its upper end arranged opposite the mouths of the air tubes.

The present invention is an improvement upon the construction disclosed by said ap plication. In that construction the chimney is a rigid structure which is vertically movable in the lantern top. In the present construction the chimney is composed of two parts, an upper stationary part which is secured within the lantern top with its upper end adjacent the mouths of the air tubes and a lower part which is vertically movable in the upper part, which latter forms a guide for the lower movable part.

In the accompanying drawings: Figure 1 is an elevation of a lantern provided with this improvement. Fig. 2 is a vertical section of the lantern top, on an enlarged scale, showing the parts in their normal position. Fig. 3 is a similar vertical section, showing the lower part of the chimney raised. Fig. 4 is a fragmentary vertical section, showing a means for securing the upper stationary part of the chimney in the lantern top. Fig. 5 is a detached plan view of the upper part of the chimney. Fig. 6 is a detached plan view of both parts of the chimney. Fig. 7 is a fragmentary vertical section of the stop device applied to the chimney.

Like reference characters refer to like parts in the several figures.

A represents the oil fount, B the air chamber on the same, C the burner, D the globe supporting plate, E the globe, F the globe lifter shaft, and G the air tubes, all of any well known or suitable construction.

H represents the top chamber to which Specification of Letters Patent.

Application filed August 13, 1912.

Patented July 22, 1913.

Serial No. 714,793.

the upper ends of the tubes are connected and which comprises a top plate 10, an upright peripheral wall 11 having openings 12 near said top plate, an internal flange 121 arranged below said openings and above the tubes, and a bottom flange 13.

I represents the upper stationary part of the chimney which is secured in the top chamber II with its upper end opposite the mouths of the air-tubes; which upper end is provided with an outwardly projecting flange 1-1. This part of the chimney is secured in the top chamber by any suitable means, for instance, by soldering, or, as shown in Fig. 4:, by being secured with its flange between an inwardly projecting head 15 formed in the peripheral wall of the chamber and projections 16 formed in said wall below said flange.

K represents the lower part of the chimney which is vertically movable in the upper stationary part and is pressed downwardly by a spring 17 to bear upon the globe and hold the latter in position. This lower part of the chimney and the globe plate are preferably provided with devices for manipulating these parts similar to the devices illustrated and described in my said application for patent. These devices comprise a lifter bar L extending upwardly from the lower part of the chimney through the top plate of the top chamber, and the lifter shaft F by which the globe plate can be raised and lowered.

The lifter bar is connected at its lower end with a cross bar 18 secured in the lower part of the chimney, and for the purpose of preventing the lifter bar from being pushed up and projected above the lantern top when the globe is raised the lifter bar is preferably provided with a vertical loop or hook 19 which connects with the cross bar.

Means are preferably provided for preventing the lower part of the chimney from dropping or being pushed out of the upper part if the lifter bar or the cross bar should become detached. For that purpose the upper stationary part of the chimney is provided at its lower end with an inwardly projecting flange 20 having several notches 21, preferably two, and the upper end of the lower part of the chimney is provided with external projections 22, preferably four, every two of which coincide with these notches. The lower part of the chimney is inserted into the upper part by engaging two of these projections over the flange 20 and then passing the remaining projections through these notches and giving the lower part a partial turn to break the coincidence. This turning movement is continued until the cross bar 18 is parallel with the flat side of the lifter bar. The cross bar is then engaged with the loop of the lifter bar and as the latter is held against turning in the slot of the top plate through which the bar extends, the notches and projections on the two parts of the chimney form an eflicient stop device which limits the downward movement of the lower part of the chimney.

The above described telescopic construction of the chimney shortens the part of the chimney which is moved up and down and provides in the stationary part an efficient guide for the movable part, while the general effect of the chimney upon the currents of air and hot gases, when the parts are in their normal position, remains substantially the same as when the entire chimney is movable, as in my said application for patent.

I claim as my invention:

1. In a tubular lantern, the combination with an air tube, and an air-inlet chamber connected with the upper end thereof, of a telescopic chimney arranged within said chamber and comprising an upper stationary part which is arranged with its open upper end opposite the mouth of said tube and discharges the products of combustion into the upper portion of said air chamber, and a lower vertically movable part which bears upon the globe, substantially as set forth.

2. In a tubular lantern, the combination with an air tube, and an air-inlet chamber connected with the upper end thereof, of a telescopic chimney arranged within said chamber and comprising an open upper stationary part arranged with its upper end opposite the mouth of said tube and having an outwardly projecting flange at its upper end and a lower vertically movable part which bears upon the globe, substantially as set forth.

3. In a tubular lantern, the combination wit-h an air tube, and an air-inlet chamber connected with the upper end thereof, of a telescopic chimney arranged within said 4. In a tubular lantern, the combination with an air tube, and an air-inlet chamber connected with the upper end thereof, of a telescopic chimney arranged within said chamber and comprising an open upper stationary part arranged with its upper end opposite the mouth of said tube and a lower vertically movable part which bears upon the globe and is arranged in said stationary part and guided in the same, substantially as set forth.

5. In a tubular lantern, the combination with an air tube and an air-inlet chamber with which the upper end of said tube is connected, of a chimney arranged within said chamber and comprising an upper stationary part having an internal flange provided with a notch and a lower vertically movable part having an external projection adapted to be passed upwardly through said notch and operating to limit the downward movement of said movable part when the latter has been turned to break the coincidence between said notch and said projection, substantially as set forth.

6. In a tubular lantern, the combination with an air tube and an air-inlet chamber with which the upper end of said tube is connected, of a chimney arranged within said chamber and comprising an upper stationary part having an internal flange provided with a notch and a lower vertically movable part having an external projection adapted to be passed upwardly through said notch, and means for preventing rotary displacement of said movable part in said stationary part after said movable part has been turned to break the coincidence between said notch and said projection, substantially as set forth.

itness my hand in the presence of two subscribing witnesses.

CHARLES L. BETTS.

lVitnesses F. W. VAN DUYN, HOWARD L. F LE'roHnR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

